Choker sling



Marh 4, 1947. A, A, BERNDT 2,416,733

cHoKER sLING Filed NOV. 5, 1945 3 Sheets-Sheet 1 March 4, 19.47.

A. A. BRNDT 2,416,733

CHOKER SLING FiledvNov. 5, 1945 y s sheets-sheet 2 A. A. BERNDT Marh 419'47.

C HOKER SLING Filed Nov, 5,' 1945 Sheets-Sheet 3 ing Athe cablel to `the-hooks;V

Patentedy Mar. y4, 1947 vCHOKER Arthur. vA. Berndt; chicago, 1111. fApplicationNovember 5, 1945, Serial No.1626g776 The invention :relates to jchoker.,slings .ofnthe vtype wherein a choker ,flxedly connected .to an end. of a cable ,has releasablerengagementiwith an intermediate portionof .the cableto form .a loopl therewith. ,More particularly,` the invention relates .to -an improved choker .including matching lhooks'pivotally supported Afor movement in opposed relation yby a `iczaibleorrope anchorage meinberof specialdesign.

Anobject of fthe invention istoprovide a choker having separable-.parts and lwhich may be readily appliedto the Vcable-.at anypoint to fform-ia Aloop of the desired size, and Awherein-said separable parts comprise overlapping and coacting hooks for-engagingthecable iin. a manner 'to completely vsurround the same, .thereby f eliminating the possibility :of-'inadvertent release'ofnthe cable. 1 i

` A ymore specific -objeetfof thefinvention'is Vto provide a choker having i'separable parts Ainthe form of pivotedlatch-inghooks and which `function in combination with a Another object resides `in the cial shape and Which said member, notwithstandpivoted latchfor loclil provisionof a choker having la cable anchoragemember offspeingfits" shape, `may have a dead zend connection Y with the cable in -anyeonven'tional manner;

Another object is to lprovide 'a' choker having separable hooks pivoted to `a member so that Ythe cable and member may assumefa 'straight line litures V`of construction .and'operation .fas .lwill 'be more fullyi described and particularly :pointed fout inthe speciflcation, Adrawingsfandclaims appended hereto. f Y i In the drawings. @which illustrate an embodiment of the.invention,wandv .wherein like reference characters are -used'ftofdesignate like :1parts-- Figure 1 is `an elevational.'viewv ofaone embodimentv of the .choker of the invention showing fthe same. in operative relation 1-with,acablelt'o-` rform aloop therewith; i.

Figure 2 is 'anV elevatonah Ivi-ew fot `another fern.;`

-bodi'ment showingrthefpivotedhoks in. combina 1^ said yoke V:formingspaced. legportions 1.13)

r15 claims., (CL 294-114) tion f'with auflatch `fin fan inoperative sepa-rated` l relation;Y

- Figure 3A is showing y:the rhooks in separated ,relation,izsimi1a.-r

to vFigure v2; 1 Figure .4is :a perspective KAview of. the choker with 'theipivoted hooks and f-latchin closedeope'native position :such'as they assume whenin enf.

gagementwithfa cable; y 1 Figure 5 is a sectional view zt'aken .vertically through the -.choker of Figure v2 Ishowing theiparts in operativeirelation'withfacable; 'f

Figure L6 is an endl elevationalrview :the overlapping `relation .of 'the matching. hooks wheninclosed position; .Figure 7 is asectional viewfillustrating the con.- struction and coactionof shown in Figure 6;.

Figure 8.is:a(fragmentary.sectional'iviewfshow- I ingone `conventional 7form ,of `cable .connection forthe cableanchorageioitlfrea'shoker;

Figure 9 .is xa .:fragmentary. sectional .-view show.-l

ing another .conventional ffrormrof cable anchor.- ager :ing -still anotherrflormY of cable anchorage; Figuren is 1a view showing lithe manner :of `forming ia. sling f with the present ;-fchokerf to lift a 4:Figure 1 2 :is another views useofthechoker of .theinvention.v4

selected ier :illustrating the invention essentially comprises a ,cable aisrchorage Jr,.' having:-aksoeket` ,best show-nin Figure 5, l-the cable-.land anchor.- .age, which v=for purposes of .description :will be termed@ y-f--z`00k1et portom has a. deadendfeong i HeCtOn-withscableil L This dead end connection y witlrfthe cable .may Joe'fmadev accordingatoagany `of the well known 1 socket connections, :the struc;- t-ure selectedforfdisclosure in Figure fincludin'g .the 'threaded screw M, 'having exterior threads 1 1|;5 adapted :tohave "threaded engagement with the; threads V:M5 formed `initer'iorly of .the .'.socket portion 110.. Before the parts aref.assembleda:the

.cable `l l is .iixedl-y4 securedttoiithescrew ll byfxthe VThe plug preferably 4has.Y are'taperln'gV vformation "to vfacilita-te gits Lentrancecentrally'fof plug .11'.

.that partrof A'the .cable 'within .screw :124. A'slften-y .sion .on :cable ylil in'creaseslitiwillrbe: understood .thatxthelplug f`|l1 v-vvill lbeidrawnfmto Ithe screw '4- to: .afgxfeater'extent..fthus-lincreasinglthe locking the Vmatchinghooks `as Figure ibis affragnrentarysectionalvaviewshowvalso illustrating "the Y .ei'erringA to the drawings, Vthe .embodiment k I action Von the cable.

.closed position on the cable. :l

` .'Rferrin'g' :"more `particularly" to said' hooks', it

The choker of .the invention additionally comprises a pair of matching `hooks Iand 2i] havingv pivotal connection to socket portion IIl The i through the instrumentality ofyoke I2. pivot pin 2I extends through the legs I3 ofthe thereto. g.fsaigi pivlpt-pin v2| isfrieasjabiy retained in place'by" ctter pin"""22. .A" latch "member 23 ure 2, the latch having connectionwith the pivot' Y pin 2|. The latch member is located betweehfthe. Yhooks I8 and v2l) and said member atits freeend pivotallycarries a cable engaging shoez 24'pivoted to member 23 centrallyyat 257.1.;'1Thecable engaging surface of shoe-24 may be roughened Connection between the l screw I4 and the choker is made by threading n i the socket portion I to said screw.

aiiava Y respective hook portion extends for approximately one-half of its Width, with the other half forining the overlapping portion.

The shoe 24 of the latch 23 is designed so asvv Y to have location within the cable receiving grooves when, the hook members are in contact. cordingly, with a cable located'in said groove the shoe 24 will be caused to engage the cable,

Vits position depending onupivotal w movement of mayfalsofbe pivoted to the socket portion I0, Fig.-

by grooves or serrationsnidentified by numeral 26` to increase the holding action of said shoe as re- "ga'rdsl-the cable. The shoe` is pivoted tothe 'end of the latch member23 so as to provide for'. sub- 'sl'.a'ntially. straight .line movement. of the'shoe in 'adire'ction p'arallel :to that: ofth icable.V Accordingly, maximum contact of the shoe' witli'the c'ibleisassured.' 'It .Will Vbe observedv that the -freeendlof latch member 23 is pointed,y providling the'angular edgesZ'I, which edges function as stop means to limit the -extent of pivotal movementoffthe-shoe 2.4; vThe said? endof 'latch member; 23 may be 'pointedfor rounded for this purpose, and Which/,functions to restrict movelfatch. kj {I1-,gis l1entirel'y optional asj towhether or not the latch fis used'in connection with the .pivoted hooks since the latch has no function "in the lifting of'the load. The purpose of the latchgis to lock theV cable .to the-hooks to prevent, spreading or release of a load when .the

V sa'meis deposited on a loading platform or other :1 support.- Asgshownin Figure 5, the latch has a Y positionoutside ofthe loop or sling and the sameis moved to an operative position in contact with the cable-when theY cable is under tenvsi'o'ndueto"the we'ight ofv the ,'fload. The action of the l latch infengaging@ the cable'and locking '-mentof'the 'shoe-td anextent'fwhere it 'will `fhave substantially straight line travel with the cable, with just suflicient .pivoting actionlto'secur'elyengage the-'cable forlocking the same toY '-thehooksll'fand 1:20 when said hooks L are in ;Wil1'.be'!observd that the.V same 'have similar. :formations atftheirffree ends althoughfthe formation-lon hokfll iszoppositely directed zwithf respect-'to tlieformation on hook.' 20. In'. kaccord-` ancelwith the invention, the hook I8 is provided -With-afU-jshaped hookportion-ZS and an over-v lappinglporti'n' 3I).1j.Sai`dE portion '28, fas a result 'of itsvcurvedsformation', providesfa trough-3I of ,fa 'siz'ej-,ojreceive th/cable@ I I. L' Infa' rsimilar manner hook 20 is provided with a U-shaped .hook- :portion '32 fming the trough 33 Aand withan overlapping portinf identied .-by numeral 34. T-hef'overlapp'ing portions 301 and 5'341 `ofthefre- 'vspectivehooksareidircted toward each; other "and when the hooks are.` in4` contact with each 'other the'portio has'ovrlapping; relation-With hook? portion-'3'2la-nd portion-'34 has overlapping relation With hook-portion 28211. This closed position of 'the hooks with-the various portionsovery v:lzalpriing is-clearly"illustrated inlFigures 6 and l'7.

f'..'The-purpose of the chokerfof-the-inventionis .toforma sling with cable II fof-'lifting purposes'.V

. .dersto'od thatrsaid I cable'l'vvill` .bei received byl the 'respective'f hook portions-Hand 32' .whi'ch pro# videaigroove v ofza-,size especially designedwto receive. said cable. WhenY the:V hooks are closed .to contacteach otherfthe hook portions 2 8 and ,32 enact` toiprovideavgroove'for the entire= width thersametolthe; hooks iisi clearly shown in Figl v,ure 5L, `Tension onf the cablejs y'released YWhen thelcadf is deposited Ton .theloadingplatform or other supp'ort'. However, .the latch preventsthe sling from expanding, thus holding the load together and preventing spreading of Said load.

Locking of the cable in this mannerris desirableat times in connection-'with 'cer-tainloads. Another feature of thefpresent inventionfresides in the pivotal connection of the hooks'I8 and.20 With the cable anchorage, namely, the v socket'portion I0; Said; pivotal. connection enables the, socket portion-and theable to assume astraightline positiomunderload, as is evidencedaby reference togllguresll and 12. Accordingly, all bending of the cable at the connection with the-socket portion is eliminated. It will be appreciated that a continued bending ofV the `cable at thegconnectionwith the lsocket portiong would verysoon vcause fatigue ofthe vcable at this point, requiring frequentV repairs. VBy procable atsaidvconnectionis eliminated. e

, flhecable anchorage member lof the present Choker has `a Special Shapeparticularly adapting it to the liftinggof' loadspasvbest` shown in Figures Y 11;and'12; The saidcable anchorage or. socket portion I0 is substantially cylindrical in shape,

havingalslight-taperf. from a reduced diameter .Y 35" adjacent Yyoke I 2 to asomewhat enlarged diameterg36 at theendgopposite the yoke. This tapering formationfis not at al1 important,'but what isk important., is r`the curvature' or contour of the cable endorgnose; o thev-socket'portion which isgmade dome-shaped.' The curvature of; this domed end-vfofithe, socket portion substantially comprises aiparabola. A paraboliccurve has been selectedfin order to facilitate contact of the domel portionjzwith Athe load being1lifted-V bythe loopf 0.1A

' slingf' `Thegparabolic curvelandcylindrical L contour. of V'the' anchoragev member Shave 'coacting functions inthe lifting oa'load sin'cefthe' curve forms a variable contactY portionfor'engagement withrthe load, Whereas the cylindrical contour of .the anchorage mernblergniakesV it possible for the ysame to'roll o'n :the 'loadland adjustitself inY Whatever `directionethetension mayV be applied. YVThis v's-best,L illustrated. in`-Figures `1'1 and 12 which showftheraction of the present choker in forming i a slingforliftinga load.- Whenthe presentdeviceis employed for lifting a large'flo'ad, indicated YbysnumeralV 31, .Figure 11, the. point ofcontact of f the :load with the l'dome-shaped' portion1'36 is' AC- y viding afstraight; linepull all bending ofY the which this dome-shaped portion 'is 'formeds Also -it'wiii noted 'that the is adattare nea 'straight imewiehthe; anser the ajel rage mben More particulariyftne hooks ight ang'la position inwardly 'toward Referring to rige 12, where the device 'of the invention is' As'liiSWfIi iii liftihgelatid With a load "ef relativen enla-11 size, it willl be observed that therpointof contact KVof the doineshaped portion 36 with th load is more'toward'the top of 1vsaid potlngon in other words, said point of contact closer'tothe no's'eof thecable anchorage momibei*t viii'lsi'mtli'e hooks -are Ibent at yan angle which approximates 90 degrees. c

vInn b'ith'instancesv the cable has a direct line pull with. its anchorage member so thatbending f thcabie at saidarleherage is eliminated. lAlso the ''c'tio'n "'o'f the cable upon tensionv being' ap'- 'plied y'tov the saine is to close the pivoted hooks 'any to hold themvi'n closed nrelation in Contact witheach other. VWith the hooks so closed 'the 'cable i'seifectively held thereby, since the cable has location in the grooves provided therefor, with the result that a positive act is required in 4order to release the cable from the hooks Yafter 'tension has been removed from the cable.

The deadend connection of cable AIl with its 'anchorage member may take several Vdiierent forns Yas previously mentioned inconnectio'n 'with Figure 5. For example, Figure 8' `shows 'a hot o'c'ke'tbonnecti'on wherein'the screw l l is formed with a tapering central bore I I9 havingr its narfijow opening 'at the head end o'f t-h'e s'crew 'and its wide opening at the 'opposite end. An end of abl IH Viis inserted in ySaid vllaliie'lilg bol'e and "the :strands 'are ffiared v'and vsecured to said screw I'lit'by'por'ing hot "zinc or the like into the wide endof the bore. The connection securely unites th'e cable tothe screw l i4 and the same is screwed member |50 being externally grooved to provide D a thimble portion for receiving the loop of the cable III. In this form of connection, the cable end is spliced to the cable and the splice is taped or bound as at ISI.

The invention is not to be limited to or by details of construction of the particular embodiment thereof illustrated in the drawings, as various other forms of the device will of course be apparent to those skilled in the art without departing from the spirit of the invention or the scope of the claims. f

What is claimed is:

1. In a device of the character described, Vin combination, a socket portion having a socket connection with a cable, of a pair of hooks pivoted to the socket portion at the end opposite said cable connection, said hooks having oppositely directed formations so that they overlap and coact when in contact, and a latch member pivoted to the socket portion and having location between the pivoted hooks.

2. In a device of the character described, in combination, a socket portion having a socket connection with a. cable, of a pair of hooks pivoted to the socket `portion at the end opposite @Qing-dit aj-ti there ieifi directed fermati@ hat they' ove ep W to y the socket 'portlon a't 'the 'fendfoplos'ite cab-1e "cnnetin, said yhookshaving opbgsiteiy directed 'formations at 'theirv free le'r'ids and each includingfa liookiportion and an overlappingpontir`j1,andaiatch 'member 'pivoted te the socket portion "and having location Vl'iet'w'een vtlie pivoted 4. In a device off the character described, I'in combination, ya: socket 'p'o'rtionhaving 'a 'dead `end connection with `AaV cable, fa 'pair 'of hooks pivoted to the socket portion at 'the end oppositesaid y'ca- 'ble connection, said hooks yhaving oppositely'di'- rect'ed formations 'at 'their free ends and each including a hook 'portion and an overlapping portion, and alatch member pivoted to the socket portion on the same axis as vsaid hooks, 4said latch member having location between 'the 'pivoted hooks.

5. In a device of the vc'harjacter described, in combination, `a socket portion' having v"a dead en'd 'connection with a cable, a vpa'ir of 'hooks pivoted tov the 'socket portionx at the 'end opposite 'said 'cable connection, 'said vl'iook'g'` having oppositel'y 'directed formations at their-free 'ends' 'and each including a nook perdon :meV @overlapping 'it'io'n, and ajlatch member `pivoted to the socket portion land located between the pivoted hooks, said latch memberincluding a part having pivotal movement on the `same aXi's as `the hooks and a cable engaging part pivoted to the l'end of said rst'mentioned part. 1 c s 6. In a device of the Vcharacter described/in combination, a socket portion having a l'dead"end connection with a cable, said 'socket portion having spaced legs projecting from the end opposite said connection with the cable, a pair of hooks located between and pivoted to the legs, 'said hooks having oppositely directed vformations at their free ends and each including a hook portion and an overlapping portion, and a latch member located between the hooks and also pivoted to said legs on the same axis as the hooks. 7. In a device of the character described, in combination, a socket portion having a dead end connection with a cable, said socket portion having spaced legs projecting from the end opposite said connection with the cable, a pair of hooks located between and pivoted to the legs, said hooks having oppositely directed formations at their free ends and each including a hook portion and an overlapping portion, and a latch member located between the hooks, said latch member including a part pivoted to saidlegs on the same axis as the hooks, and a cable engaging part pivoted to the end of said first mentioned part.

8. In a device of the character described, in combination, a socket portion having a dead end connection with a cable at one end of said portion, said portion at its other end having an integral yoke providing spaced legs, a pair of ca- :ble engaging hooks located between and pivoted to the legs, each said hook having a hook portion and an overlapping portion formed on its free end, .the respective hook portions being over- -cable engaging `hooks located between andpivoted to the legs, each'said hook havingv a hook portion and an overlapping yportion formed on itsfree end, the `respective hook portions having contact when the hooks are moved toward each other 'and each hook portion being overlapped by the overlapping portion of the other hook, and a latch member including a part located between the Vhooks and pivoted to said legs on "thesa'me axis as the hooks and a cable engaging yshoe pivoted to the free end of said part.

V10.,A device as dened by claim 6 wherein the `pairof hooksv and latch member are pivoted to the legs by a pivot pin providing an axis normal vto the longitudinal axis of the socket portion,

andwherein said socket portion is substantially cylindrical'having a tapering formation from a reduced section adjacent the legs to a slightly enlarged sectionat'the cable connection end.

portion is' substantially cylindrical having a tapering formation from a reduced section adjacent the yoke to a 'slightly enlarged section vat the cable connection. end.

.'12. In a choker, in combination, a ymember .having Va dead-end connection with a cable at one end thereof,'a pair of hooks pivoted to the member atfthe other rend thereof for movement Atoward and from each othersaid hooks having vopposite'l'y directed formations at their free Vends A`8 and each including a hook portion and anover; lapping portion. i

13. In a choker, in combination; a"mernberhav.-l

ing a dead-end connection with a ,cable at one end thereof, said member having. spaced jlegs projecting Vfrom the` opposite end' thereof, apair of hooks located between and pivoted to -the legs Yfor movement toward and from each other," said hooks having oppositely-directed Aformations at their free ends and each including va hook portion and an overlapping portion. c f 14. In a choker, in combination, an'anchorag'e member having av dead-endV conn'ectionf'fwith" a cable at one end thereof, said .member at vits other end providing an integral yoke'Q-formin'g spaced legs, a pair of cablefengaging hooksflolcated between and pivoted to the legs for movement toward and from eachother,v each said hook at its free yend havingfa lh ook portion and anoverlapping portion formed thereon, there,- spective hook portions being/overlapped by, the overlapping portion of the other hook when said hooks are in contact, and said anchorage meinber being substantially cylindrical andrhaving a dome-shaped .portion atV the end connecting with said cable. v l

15. I n a choker, in combination, an anchorage member having a dead-end connection with a cable at one end thereof, said Vmember at its other end providing an integral yoke forming spaced legs, a pair of cable. engaging hooks located between and pivoted'to the legs for move spective hook portions having contact when the hooks are moved toward each other andreach hook. portion being overlapped by thel overlappingrportion of the other hook, and said anchorage member Vbeing substantially cylindrical-and having a dome portion'of parabolic shape at theV end connecting with said cable. A

` ARTHUR A. BERNDT. 

